CN217709803U

CN217709803U - Drawing frame speed detection and broken end automatic stop device

Info

Publication number: CN217709803U
Application number: CN202221985147.7U
Authority: CN
Inventors: 石争争; 杜建伟
Original assignee: Henan Wuyang Textile Co ltd
Current assignee: Henan Wuyang Textile Co ltd
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2022-11-01
Anticipated expiration: 2032-07-29

Abstract

The utility model relates to a speed detection and broken end automatic stop device of a drawing frame, which effectively solves the problems that the broken bar detection is not timely and the detection equipment is easy to report by mistake; the technical scheme includes that the drawing frame comprises a drawing frame body, a plurality of support frames in the front-back direction are mounted on the right side of the drawing frame body, and a plurality of raw sliver rolls are placed on the right side of each support frame; each support frame is provided with a plurality of detection devices; the raw sliver end of each raw sliver roll passes through one or more detection devices and then enters the drawing frame body; the utility model discloses can be in real time through the speed variation of monitoring different positions on the same root growth strip, shut down the instruction as disconnected strip.

Description

Drawing frame speed detection and broken end automatic stop device

Technical Field

The utility model relates to the field of textile technology, especially a drawing frame speed detects and broken end stop motion.

Background

The drawing frame is used for combining a plurality of raw slivers produced by the carding machine into strands, and the evenness of the slivers and the fiber state are improved. The unevenness of the raw sliver is large, the arrangement of the inner fibers is disordered, and most of the fibers are in a hook state; and therefore limited strength; when drawing is performed, sliver breakage is easy to occur; thereby affecting the quality of the drawn sliver.

At present, the broken strip detection of the drawing frame has various modes such as mechanical mode, photoelectric mode and the like, for example, patents of a broken strip alarm locking device at the rear of the CN212477004U drawing frame, a CN210826504U drawing frame and the like. The detection mode of the patent is single-point detection, namely, detection is carried out on one position in the whole cotton sliver; however, in practice, because the positions of the breakpoints are different, when one position is adopted for detection, the action can be triggered only when the breakpoints of the cotton sliver are fed to pass through the detection point; leading to slow reaction of broken strip detection and failure of timely shutdown.

Some patent documents also disclose devices for detecting tension, for example, a sliver breakage detecting device of a drawing frame of CN216193001U, which triggers an operation by changing the tension of a sliver after sliver breakage; however, because the cotton sliver is fed at a non-uniform speed, on one hand, the speed fluctuates, and on the other hand, the whole cotton sliver can also shake in the conveying process; therefore, the equipment is easy to misreport and trigger by mistake.

Disclosure of Invention

To the situation, for solving the problem that exists among the prior art, the utility model aims at providing a drawing frame speed detects and broken end stop motion, can effectively solve the problem that the broken string detected untimely, and check out test set easily misstatement.

The technical scheme includes that the drawing frame comprises a drawing frame body, wherein a plurality of support frames in the front-back direction are mounted on the right side of the drawing frame body, and a plurality of raw sliver rolls are placed on the right side of each support frame; each support frame is provided with a plurality of detection devices; the raw sliver end of each raw sliver roll passes through one or more detection devices and then enters the drawing frame body;

the detection device comprises a bottom plate fixed on the support frame, a plurality of guide rods are arranged on the bottom plate, a flat plate capable of moving up and down is arranged on the plurality of guide rods, a detection roller is arranged on the bottom plate, and pressing rollers positioned on the left side and the right side of the detection roller are arranged on the flat plate; the bottom plate is provided with a speed sensor corresponding to the detection roller, and the speed sensors on the plurality of detection devices are converged into the controller; and when the speed of one detection roller is lower than the speeds of the other detection rollers, the controller controls the drawing frame body to stop.

The utility model discloses the benefit: 1. the speed change of different positions on the same sliver can be monitored in real time to serve as a sliver breakage shutdown indication. 2. The tension inconsistency, abnormal feeding and the like can be found out through the speed difference among the plurality of strips.

Drawings

Fig. 1 is a top view of the present invention.

Fig. 2 is a front view of the present invention.

Fig. 3 is a schematic view of the detecting device of the present invention.

Detailed Description

The following describes the embodiments of the present invention in further detail with reference to the attached drawings.

As shown in fig. 1 to 3, the drawing frame comprises a drawing frame body 1, wherein a plurality of support frames 2 in the front-back direction are arranged on the right side of the drawing frame body 1, and a plurality of raw sliver rolls 3 are placed on the right side of each support frame 2; each support frame 2 is provided with a plurality of detection devices 4; the sliver end of each sliver roll 3 passes through one or more detection devices 4 and then enters the drawing frame body 1;

the detection device 4 comprises a bottom plate 401 fixed on the support frame 2, a plurality of guide rods 402 are arranged on the bottom plate 401, a flat plate 403 capable of moving up and down is arranged on the plurality of guide rods 402, a detection roller 404 is arranged on the bottom plate 401, and pressing rollers 405 positioned at the left side and the right side of the detection roller 404 are arranged on the flat plate 403; a speed sensor 406 corresponding to the detection roller 404 is arranged on the bottom plate 401, and the speed sensors 406 on the plurality of detection devices 4 are integrated into a controller; when the speed of one of the sensing rollers 404 is lower than the speeds of the remaining sensing rollers 404, the controller controls the drawing frame body 1 to stop.

In order to realize the tightness adjustment of the pressing roller 405, a pressure spring 407 positioned between the bottom plate 401 and the flat plate 403 is mounted on each guide rod 402, and a counterweight 408 is sleeved on the upper end of each guide rod 402. The force of the pinch roller 405 is adjusted by adjusting the number of weights 408.

For the detection, the end of the sliver on the leftmost sliver roll 3 passes through only one detection device 4, and the slivers on the remaining sliver rolls 3 pass through two detection devices 4. Two detection devices 4 on the same sliver are close to the drawing frame body 1 one and the other is close to the sliver roll 3.

In order to better realize detection, the controller controls the drawing frame body 1 to stop after the speed difference value of the detection roller 404 in the two detection devices 4 corresponding to the same sliver is larger than a set value.

When the utility model is used, firstly, the raw sliver at the end part of the raw sliver roll 3 passes through the detection device 4 and then is merged into the interior of the drawing frame body 1 in a mode shown in the attached drawing 1; because the two raw sticks on the leftmost side can only correspond to one detection device 4, only one detection device 4 needs to be penetrated; the ends of the raw strips on the rest of the raw strip rolls 3 pass through two detection devices 4.

Meanwhile, according to actual needs, the force of the pressing roller 405 is adjusted by controlling the number of the balancing weights 408 on the guide rod 402 of each detection device 4, so that the raw strips can drive the detection roller 404 to stably rotate; because the detection roller 404 and the press roller can rotate, and the pressing roller 405 can move up and down to adapt to the tension change of the raw strips through the elastic setting of the pressure spring 407, the influence of the detection device 4 on the raw strips is avoided to the greatest extent, and the raw strips are prevented from being broken due to excessive friction force.

When the device is used, two detection modes are provided through the pre-programming of the controller.

The first method comprises the following steps: by detecting the rotational speed of two detection rollers 404 corresponding to the same sliver; and setting the difference value of the two speeds, and stopping the machine when the speed difference exceeds a set value. Because the rotation speeds of the two detection rollers 404 corresponding to the same sliver are theoretically consistent, and fluctuate in time, the difference value is within a certain range, and therefore, when the difference value between the two speeds is too large, the operation is abnormal, and the conditions of wire breakage, winding and the like can occur. In addition, because one of the two detection devices 4 on the same sliver is close to the drawing frame body 1, and the other detection device is close to the sliver roll 3, the two detection devices 4 can detect the pulling-out part of the whole sliver, and no matter any point breaks, the two detection devices can respond timely through the change of speed.

And the second method comprises the following steps: by detecting the rotational speed of all the detection rollers 404, the apparatus is stopped when the speed of any one detection roller 404 is significantly different from the speeds of the remaining detection rollers 404. Because a plurality of raw slivers enter the drawing frame body 1 at the same time for drawing; therefore, the conveying speed of the plurality of raw slivers is kept consistent theoretically; when one of the raw strips is broken, the speed of the corresponding detection roller 404 is abnormal and is larger than the normal speed fluctuation threshold value, and the shutdown is triggered. Through the mode, the feeding condition and the broken condition of all the raw slivers on the whole drawing frame can be comprehensively controlled, and the system can timely react.

The set value of the speed difference value of the first mode is smaller than that of the second mode, so that the detection of the first mode is more sensitive and controls the condition of a single raw strip. The second category is global control, which can control the situation between bars and also considers only one raw bar corresponding to the detection device 4.

The device can process the broken sliver condition of the sliver in time by detecting the speed change of different positions on the same sliver, and the reaction is sensitive.

This device is through detecting the speed variation on the different raw strips, can control the feeding condition between raw strip and the raw strip, and timely adjusts the too slow or too fast raw strip of feed speed book 3, guarantees that speed and tension between many are unanimous, has improved off-the-shelf quality.

Claims

1. A drawing frame speed detection and broken end automatic stop device comprises a drawing frame body (1), and is characterized in that a plurality of support frames (2) in the front-back direction are mounted on the right side of the drawing frame body (1), and a plurality of raw sliver coils (3) are placed on the right side of each support frame (2); each support frame (2) is provided with a plurality of detection devices (4); the sliver end of each sliver roll (3) passes through one or more detection devices (4) and then enters the drawing frame body (1);

the detection device (4) comprises a bottom plate (401) fixed on the support frame (2), a plurality of guide rods (402) are mounted on the bottom plate (401), a flat plate (403) capable of moving up and down is mounted on the guide rods (402), a detection roller (404) is mounted on the bottom plate (401), and pressing rollers (405) located on the left side and the right side of the detection roller (404) are mounted on the flat plate (403); a speed sensor (406) corresponding to the detection roller (404) is arranged on the bottom plate (401), and the speed sensors (406) on the plurality of detection devices (4) are integrated into a controller; when the speed of one detection roller (404) is lower than the speeds of the other detection rollers (404), the controller controls the drawing frame body (1) to stop.

2. The drawing frame speed detection and head breakage automatic stop device according to claim 1, characterized in that a pressure spring (407) between the bottom plate (401) and the flat plate (403) is mounted on each guide rod (402), and a balancing weight (408) is sleeved on the upper end of the guide rod (402).

3. The drawing frame speed detecting and automatic stop motion device according to claim 1, wherein the end of the sliver on the leftmost sliver reel (3) passes through only one detecting device (4), and the slivers on the remaining sliver reels (3) pass through two detecting devices (4).

4. The drawing frame speed detection and automatic end breakage stop device according to claim 1, characterized in that the controller controls the drawing frame body (1) to stop after the speed difference value of the detection rollers (404) in the two detection devices (4) corresponding to the same sliver is larger than a set value.